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An equivalent linearization procedure for displacement-based seismic assessment of vulnerable RC buildings

Gunay, M. Selim
Sucuoğlu, Haluk
Seismic assessment of vulnerable reinforced concrete buildings in Turkey is a challenging task. Considering both the size of the problem and the inadequacy of inelastic analysis methods in the seismic evaluation of large building stocks, it is evident that simple and convenient methods are required. A displacement-based seismic assessment procedure, employing equivalent linear analysis in combination with capacity principles, is developed herein. Briefly, the procedure consists of identifying the expected locations of inelastic behavior and reducing the stiffness of members corresponding to these locations. The procedure is implemented on three case study buildings in order to compare the results with the nonlinear static (pushover) analysis results. Comparisons are based on axial forces and moment capacities of columns, distribution of the locations exhibiting inelastic behavior, chord rotations at the member ends and the base shear capacities of buildings. It is observed that the results obtained by the two procedures are sufficiently close.